This topic created in 2314 days ago, the information mentioned may be changed or developed.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4701
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;www.baidu.com. IN A
;; ANSWER SECTION:
www.baidu.com. 618797164 IN CNAME www.a.shifen.com.
www.a.shifen.com. 618796132 IN A 220.181.38.150
www.a.shifen.com. 618796132 IN A 220.181.38.149
;; Query time: 0 msec
;; SERVER: 219.141.140.10#53(219.141.140.10)
;; WHEN: Thu Dec 26 17:55:15 2019
;; MSG SIZE rcvd: 90
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4701
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;www.baidu.com. IN A
;; ANSWER SECTION:
www.baidu.com. 618797164 IN CNAME www.a.shifen.com.
www.a.shifen.com. 618796132 IN A 220.181.38.150
www.a.shifen.com. 618796132 IN A 220.181.38.149
;; Query time: 0 msec
;; SERVER: 219.141.140.10#53(219.141.140.10)
;; WHEN: Thu Dec 26 17:55:15 2019
;; MSG SIZE rcvd: 90
Supplement 1 · Dec 27, 2019
又恢复正常的，感觉像是 ISP 的特殊操作
8 replies • 2020-02-18 21:03:00 +08:00
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1
ysc3839 Dec 26, 2019
故意让客户端缓存不失效，降低服务器压力？
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2
microluo061 OP @ysc3839 这对 CDN 来说是噩梦
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3
wanguorui123 Dec 27, 2019
TTL 不是代表时间，而是转发数量防止循环发包
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4
ysc3839 Dec 27, 2019
@wanguorui123 这是 DNS 的 TTL，是缓存时间。你说的 TTL 是 IP 协议的。
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6
Sekai Dec 28, 2019
自信 就是这样自信
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7
leido Dec 30, 2019
运营商 nc
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8
biglee0304 Feb 18, 2020
维护长治久安
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